Approximations of the Exchange and Correlation Potentials

  • L. J. Sham
Part of the The IBM Research Symposia Series book series (IRSS)


A review is made of the approximate exchange and correlation potentials. A calculation of the gradient correction to the exchange potential is presented and the systematic expansion of the potentials in powers of the gradients of the density is critically examined. A related question concerning the validity of the local exchange raised by Overhauser is investigated here.


Local Density Approximation Correlation Potential Exchange Operator Density Response Thomas Fermi 
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References and Footnotes

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Copyright information

© Plenum Press, New York 1971

Authors and Affiliations

  • L. J. Sham
    • 1
  1. 1.University of CaliforniaSan Diego, La JollaUSA

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